#!/bin/bash

# Source:
# https://github.com/alangecker/bbb-packages/blob/f83431c227be2c95025ea81083baeaa87667b170/bbb-webrtc-sfu/data/etc/cron.hourly/bbb-restart-kms

#
# Restart Kurento every 24+ hours
#

if [ ! -f /tmp/bbb-kms-last-restart.txt ]; then
  date +%Y-%m-%d\ %H:%M:%S > /tmp/bbb-kms-last-restart.txt
  exit
fi

users=$(mongo --quiet mongodb://10.7.7.6:27017/meteor --eval "db.users.count()")
echo "currently active users: $users"

if [ "$users" -eq 0 ]; then

  # Make sure 24 hours have passed since last restart

  # Seconds since epoch for last restart
  dt1=$(cat /tmp/bbb-kms-last-restart.txt)
  t1=`date --date="$dt1" +%s`

  # Current seconds since epoch
  dt2=`date +%Y-%m-%d\ %H:%M:%S`
  t2=`date --date="$dt2" +%s`

  # Hours since last restart
  let "tDiff=$t2-$t1"
  let "hDiff=$tDiff/3600"

  if [ "$hDiff" -ge 24 ]; then
    echo "scheduled restart of kurento after 24h"
    CONTAINER_ID=$(docker ps | grep kurento | awk '{print $1}')
    docker restart $CONTAINER_ID
    date +%Y-%m-%d\ %H:%M:%S > /tmp/bbb-kms-last-restart.txt
  fi
fi